Collect @viewport before constructing RuleSets.

third_party/WebKit/Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 415 matching lines @@
     if (layoutView.usesCompositing())
       layoutView.compositor()->frameViewDidChangeSize();
   }
 
   if (frameSizeChanged) {
     viewportSizeChanged(newRect.width() != oldRect.width(),
                         newRect.height() != oldRect.height());
 
     if (m_frame->isMainFrame())
       m_frame->host()->visualViewport().mainFrameDidChangeSize();
+
     frame().loader().restoreScrollPositionAndViewState();
   }
 }
 
 Page* FrameView::page() const {
   return frame().page();
 }
 
 LayoutView* FrameView::layoutView() const {
   return frame().contentLayoutObject();
@@ skipping 4032 matching lines @@
     return false;
   return m_subtreeThrottled ||
          (m_hiddenForThrottling && m_crossOriginForThrottling);
 }
 
 void FrameView::setInitialViewportSize(const IntSize& viewportSize) {
   if (viewportSize == m_initialViewportSize)
     return;
 
   m_initialViewportSize = viewportSize;
-  // TODO(rune@opera.com): Notify the viewport style resolver about the changed
-  // initial viewport:
-  //
-  // if (Document* document = m_frame->document())
-  //   document->styleEngine().initialViewportChanged();
+  if (Document* document = m_frame->document())
+    document->styleEngine().initialViewportChanged();
 }
 
 int FrameView::initialViewportWidth() const {
   DCHECK(m_frame->isMainFrame());
   return m_initialViewportSize.width();
 }
 
 int FrameView::initialViewportHeight() const {
   DCHECK(m_frame->isMainFrame());
   return m_initialViewportSize.height();
 }
 
 }  // namespace blink